+++ /dev/null
-// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
-// vim: ts=8 sw=2 smarttab
-/*
- * Ceph - scalable distributed file system
- *
- * Copyright (C) 2014 Adam Crume <adamcrume@gmail.com>
- *
- * This is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License version 2.1, as published by the Free Software
- * Foundation. See file COPYING.
- *
- */
-
-// This code assumes that IO IDs and timestamps are related monotonically.
-// In other words, (a.id < b.id) == (a.timestamp < b.timestamp) for all IOs a and b.
-
-#include "common/errno.h"
-#include "rbd_replay/ActionTypes.h"
-#include <babeltrace/babeltrace.h>
-#include <babeltrace/ctf/events.h>
-#include <babeltrace/ctf/iterator.h>
-#include <sys/types.h>
-#include <fcntl.h>
-#include <cstdlib>
-#include <string>
-#include <assert.h>
-#include <fstream>
-#include <set>
-#include <boost/thread/thread.hpp>
-#include <boost/scope_exit.hpp>
-#include "ios.hpp"
-
-using namespace std;
-using namespace rbd_replay;
-
-#define ASSERT_EXIT(check, str) \
- if (!(check)) { \
- std::cerr << str << std::endl; \
- exit(1); \
- }
-
-class Thread {
-public:
- typedef boost::shared_ptr<Thread> ptr;
-
- Thread(thread_id_t id,
- uint64_t window)
- : m_id(id),
- m_window(window),
- m_latest_io(IO::ptr()),
- m_max_ts(0) {
- }
-
- void insert_ts(uint64_t ts) {
- if (m_max_ts == 0 || ts > m_max_ts) {
- m_max_ts = ts;
- }
- }
-
- uint64_t max_ts() const {
- return m_max_ts;
- }
-
- void issued_io(IO::ptr io, std::set<IO::ptr> *latest_ios) {
- assert(io);
- if (m_latest_io.get() != NULL) {
- latest_ios->erase(m_latest_io);
- }
- m_latest_io = io;
- latest_ios->insert(io);
- }
-
- thread_id_t id() const {
- return m_id;
- }
-
- IO::ptr latest_io() {
- return m_latest_io;
- }
-
-private:
- thread_id_t m_id;
- uint64_t m_window;
- IO::ptr m_latest_io;
- uint64_t m_max_ts;
-};
-
-class AnonymizedImage {
-public:
- void init(string image_name, int index) {
- assert(m_image_name == "");
- m_image_name = image_name;
- ostringstream oss;
- oss << "image" << index;
- m_anonymized_image_name = oss.str();
- }
-
- string image_name() const {
- return m_image_name;
- }
-
- pair<string, string> anonymize(string snap_name) {
- if (snap_name == "") {
- return pair<string, string>(m_anonymized_image_name, "");
- }
- string& anonymized_snap_name(m_snaps[snap_name]);
- if (anonymized_snap_name == "") {
- ostringstream oss;
- oss << "snap" << m_snaps.size();
- anonymized_snap_name = oss.str();
- }
- return pair<string, string>(m_anonymized_image_name, anonymized_snap_name);
- }
-
-private:
- string m_image_name;
- string m_anonymized_image_name;
- map<string, string> m_snaps;
-};
-
-static void usage(string prog) {
- std::stringstream str;
- str << "Usage: " << prog << " ";
- std::cout << str.str() << "[ --window <seconds> ] [ --anonymize ] [ --verbose ]" << std::endl
- << std::string(str.str().size(), ' ') << "<trace-input> <replay-output>" << endl;
-}
-
-__attribute__((noreturn)) static void usage_exit(string prog, string msg) {
- cerr << msg << endl;
- usage(prog);
- exit(1);
-}
-
-class Processor {
-public:
- Processor()
- : m_window(1000000000ULL), // 1 billion nanoseconds, i.e., one second
- m_io_count(0),
- m_anonymize(false),
- m_verbose(false) {
- }
-
- void run(vector<string> args) {
- string input_file_name;
- string output_file_name;
- bool got_input = false;
- bool got_output = false;
- for (int i = 1, nargs = args.size(); i < nargs; i++) {
- const string& arg(args[i]);
- if (arg == "--window") {
- if (i == nargs - 1) {
- usage_exit(args[0], "--window requires an argument");
- }
- m_window = (uint64_t)(1e9 * atof(args[++i].c_str()));
- } else if (arg.compare(0, 9, "--window=") == 0) {
- m_window = (uint64_t)(1e9 * atof(arg.c_str() + sizeof("--window=")));
- } else if (arg == "--anonymize") {
- m_anonymize = true;
- } else if (arg == "--verbose") {
- m_verbose = true;
- } else if (arg == "-h" || arg == "--help") {
- usage(args[0]);
- exit(0);
- } else if (arg.compare(0, 1, "-") == 0) {
- usage_exit(args[0], "Unrecognized argument: " + arg);
- } else if (!got_input) {
- input_file_name = arg;
- got_input = true;
- } else if (!got_output) {
- output_file_name = arg;
- got_output = true;
- } else {
- usage_exit(args[0], "Too many arguments");
- }
- }
- if (!got_output) {
- usage_exit(args[0], "Not enough arguments");
- }
-
- struct bt_context *ctx = bt_context_create();
- int trace_handle = bt_context_add_trace(ctx,
- input_file_name.c_str(), // path
- "ctf", // format
- NULL, // packet_seek
- NULL, // stream_list
- NULL); // metadata
- ASSERT_EXIT(trace_handle >= 0, "Error loading trace file");
-
- uint64_t start_time_ns = bt_trace_handle_get_timestamp_begin(ctx, trace_handle, BT_CLOCK_REAL);
- ASSERT_EXIT(start_time_ns != -1ULL,
- "Error extracting creation time from trace");
-
- struct bt_ctf_iter *itr = bt_ctf_iter_create(ctx,
- NULL, // begin_pos
- NULL); // end_pos
- assert(itr);
-
- struct bt_iter *bt_itr = bt_ctf_get_iter(itr);
-
- int fd = open(output_file_name.c_str(), O_WRONLY | O_CREAT | O_EXCL, 0644);
- ASSERT_EXIT(fd >= 0, "Error opening output file " << output_file_name <<
- ": " << cpp_strerror(errno));
- BOOST_SCOPE_EXIT( (fd) ) {
- close(fd);
- } BOOST_SCOPE_EXIT_END;
-
- write_banner(fd);
-
- uint64_t trace_start = 0;
- bool first = true;
- while(true) {
- struct bt_ctf_event *evt = bt_ctf_iter_read_event(itr);
- if(!evt) {
- break;
- }
- uint64_t ts = bt_ctf_get_timestamp(evt);
- ASSERT_EXIT(ts != -1ULL, "Error extracting event timestamp");
-
- if (first) {
- trace_start = ts;
- first = false;
- }
- ts -= trace_start;
- ts += 4; // This is so we have room to insert two events (thread start and open image) at unique timestamps before whatever the first event is.
-
- IO::ptrs ptrs;
- process_event(ts, evt, &ptrs);
- serialize_events(fd, ptrs);
-
- int r = bt_iter_next(bt_itr);
- ASSERT_EXIT(r == 0, "Error advancing event iterator");
- }
-
- bt_ctf_iter_destroy(itr);
-
- insert_thread_stops(fd);
- }
-
-private:
- void write_banner(int fd) {
- bufferlist bl;
- bl.append(rbd_replay::action::BANNER);
- int r = bl.write_fd(fd);
- ASSERT_EXIT(r >= 0, "Error writing to output file: " << cpp_strerror(r));
- }
-
- void serialize_events(int fd, const IO::ptrs &ptrs) {
- for (IO::ptrs::const_iterator it = ptrs.begin(); it != ptrs.end(); ++it) {
- IO::ptr io(*it);
-
- bufferlist bl;
- io->encode(bl);
-
- int r = bl.write_fd(fd);
- ASSERT_EXIT(r >= 0, "Error writing to output file: " << cpp_strerror(r));
-
- if (m_verbose) {
- io->write_debug(std::cout);
- std::cout << std::endl;
- }
- }
- }
-
- void insert_thread_stops(int fd) {
- IO::ptrs ios;
- for (map<thread_id_t, Thread::ptr>::const_iterator itr = m_threads.begin(),
- end = m_threads.end(); itr != end; ++itr) {
- Thread::ptr thread(itr->second);
- ios.push_back(IO::ptr(new StopThreadIO(next_id(), thread->max_ts(),
- thread->id(),
- m_recent_completions)));
- }
- serialize_events(fd, ios);
- }
-
- void process_event(uint64_t ts, struct bt_ctf_event *evt,
- IO::ptrs *ios) {
- const char *event_name = bt_ctf_event_name(evt);
- const struct bt_definition *scope_context = bt_ctf_get_top_level_scope(evt,
- BT_STREAM_EVENT_CONTEXT);
- ASSERT_EXIT(scope_context != NULL, "Error retrieving event context");
-
- const struct bt_definition *scope_fields = bt_ctf_get_top_level_scope(evt,
- BT_EVENT_FIELDS);
- ASSERT_EXIT(scope_fields != NULL, "Error retrieving event fields");
-
- const struct bt_definition *pthread_id_field = bt_ctf_get_field(evt, scope_context, "pthread_id");
- ASSERT_EXIT(pthread_id_field != NULL, "Error retrieving thread id");
-
- thread_id_t threadID = bt_ctf_get_uint64(pthread_id_field);
- Thread::ptr &thread(m_threads[threadID]);
- if (!thread) {
- thread.reset(new Thread(threadID, m_window));
- IO::ptr io(new StartThreadIO(next_id(), ts - 4, threadID));
- ios->push_back(io);
- }
- thread->insert_ts(ts);
-
- class FieldLookup {
- public:
- FieldLookup(struct bt_ctf_event *evt,
- const struct bt_definition *scope)
- : m_evt(evt),
- m_scope(scope) {
- }
-
- const char* string(const char* name) {
- const struct bt_definition *field = bt_ctf_get_field(m_evt, m_scope, name);
- ASSERT_EXIT(field != NULL, "Error retrieving field '" << name << "'");
-
- const char* c = bt_ctf_get_string(field);
- int err = bt_ctf_field_get_error();
- ASSERT_EXIT(c && err == 0, "Error retrieving field value '" << name <<
- "': error=" << err);
- return c;
- }
-
- int64_t int64(const char* name) {
- const struct bt_definition *field = bt_ctf_get_field(m_evt, m_scope, name);
- ASSERT_EXIT(field != NULL, "Error retrieving field '" << name << "'");
-
- int64_t val = bt_ctf_get_int64(field);
- int err = bt_ctf_field_get_error();
- ASSERT_EXIT(err == 0, "Error retrieving field value '" << name <<
- "': error=" << err);
- return val;
- }
-
- uint64_t uint64(const char* name) {
- const struct bt_definition *field = bt_ctf_get_field(m_evt, m_scope, name);
- ASSERT_EXIT(field != NULL, "Error retrieving field '" << name << "'");
-
- uint64_t val = bt_ctf_get_uint64(field);
- int err = bt_ctf_field_get_error();
- ASSERT_EXIT(err == 0, "Error retrieving field value '" << name <<
- "': error=" << err);
- return val;
- }
-
- private:
- struct bt_ctf_event *m_evt;
- const struct bt_definition *m_scope;
- } fields(evt, scope_fields);
-
- if (strcmp(event_name, "librbd:open_image_enter") == 0) {
- string name(fields.string("name"));
- string snap_name(fields.string("snap_name"));
- bool readonly = fields.uint64("read_only");
- imagectx_id_t imagectx = fields.uint64("imagectx");
- action_id_t ionum = next_id();
- pair<string, string> aname(map_image_snap(name, snap_name));
- IO::ptr io(new OpenImageIO(ionum, ts, threadID, m_recent_completions,
- imagectx, aname.first, aname.second,
- readonly));
- thread->issued_io(io, &m_latest_ios);
- ios->push_back(io);
- } else if (strcmp(event_name, "librbd:open_image_exit") == 0) {
- completed(thread->latest_io());
- boost::shared_ptr<OpenImageIO> io(boost::dynamic_pointer_cast<OpenImageIO>(thread->latest_io()));
- assert(io);
- m_open_images.insert(io->imagectx());
- } else if (strcmp(event_name, "librbd:close_image_enter") == 0) {
- imagectx_id_t imagectx = fields.uint64("imagectx");
- action_id_t ionum = next_id();
- IO::ptr io(new CloseImageIO(ionum, ts, threadID, m_recent_completions,
- imagectx));
- thread->issued_io(io, &m_latest_ios);
- ios->push_back(thread->latest_io());
- } else if (strcmp(event_name, "librbd:close_image_exit") == 0) {
- completed(thread->latest_io());
- boost::shared_ptr<CloseImageIO> io(boost::dynamic_pointer_cast<CloseImageIO>(thread->latest_io()));
- assert(io);
- m_open_images.erase(io->imagectx());
- } else if (strcmp(event_name, "librbd:aio_open_image_enter") == 0) {
- string name(fields.string("name"));
- string snap_name(fields.string("snap_name"));
- bool readonly = fields.uint64("read_only");
- imagectx_id_t imagectx = fields.uint64("imagectx");
- uint64_t completion = fields.uint64("completion");
- action_id_t ionum = next_id();
- pair<string, string> aname(map_image_snap(name, snap_name));
- IO::ptr io(new AioOpenImageIO(ionum, ts, threadID, m_recent_completions,
- imagectx, aname.first, aname.second,
- readonly));
- thread->issued_io(io, &m_latest_ios);
- ios->push_back(io);
- m_pending_ios[completion] = io;
- } else if (strcmp(event_name, "librbd:aio_close_image_enter") == 0) {
- imagectx_id_t imagectx = fields.uint64("imagectx");
- uint64_t completion = fields.uint64("completion");
- action_id_t ionum = next_id();
- IO::ptr io(new AioCloseImageIO(ionum, ts, threadID, m_recent_completions,
- imagectx));
- thread->issued_io(io, &m_latest_ios);
- ios->push_back(thread->latest_io());
- m_pending_ios[completion] = io;
- } else if (strcmp(event_name, "librbd:read_enter") == 0 ||
- strcmp(event_name, "librbd:read2_enter") == 0) {
- string name(fields.string("name"));
- string snap_name(fields.string("snap_name"));
- bool readonly = fields.int64("read_only");
- imagectx_id_t imagectx = fields.uint64("imagectx");
- uint64_t offset = fields.uint64("offset");
- uint64_t length = fields.uint64("length");
- require_image(ts, thread, imagectx, name, snap_name, readonly, ios);
- action_id_t ionum = next_id();
- IO::ptr io(new ReadIO(ionum, ts, threadID, m_recent_completions, imagectx,
- offset, length));
- thread->issued_io(io, &m_latest_ios);
- ios->push_back(io);
- } else if (strcmp(event_name, "librbd:read_exit") == 0) {
- completed(thread->latest_io());
- } else if (strcmp(event_name, "librbd:write_enter") == 0 ||
- strcmp(event_name, "librbd:write2_enter") == 0) {
- string name(fields.string("name"));
- string snap_name(fields.string("snap_name"));
- bool readonly = fields.int64("read_only");
- uint64_t offset = fields.uint64("off");
- uint64_t length = fields.uint64("buf_len");
- imagectx_id_t imagectx = fields.uint64("imagectx");
- require_image(ts, thread, imagectx, name, snap_name, readonly, ios);
- action_id_t ionum = next_id();
- IO::ptr io(new WriteIO(ionum, ts, threadID, m_recent_completions,
- imagectx, offset, length));
- thread->issued_io(io, &m_latest_ios);
- ios->push_back(io);
- } else if (strcmp(event_name, "librbd:write_exit") == 0) {
- completed(thread->latest_io());
- } else if (strcmp(event_name, "librbd:discard_enter") == 0) {
- string name(fields.string("name"));
- string snap_name(fields.string("snap_name"));
- bool readonly = fields.int64("read_only");
- uint64_t offset = fields.uint64("off");
- uint64_t length = fields.uint64("len");
- imagectx_id_t imagectx = fields.uint64("imagectx");
- require_image(ts, thread, imagectx, name, snap_name, readonly, ios);
- action_id_t ionum = next_id();
- IO::ptr io(new DiscardIO(ionum, ts, threadID, m_recent_completions,
- imagectx, offset, length));
- thread->issued_io(io, &m_latest_ios);
- ios->push_back(io);
- } else if (strcmp(event_name, "librbd:discard_exit") == 0) {
- completed(thread->latest_io());
- } else if (strcmp(event_name, "librbd:aio_read_enter") == 0 ||
- strcmp(event_name, "librbd:aio_read2_enter") == 0) {
- string name(fields.string("name"));
- string snap_name(fields.string("snap_name"));
- bool readonly = fields.int64("read_only");
- uint64_t completion = fields.uint64("completion");
- imagectx_id_t imagectx = fields.uint64("imagectx");
- uint64_t offset = fields.uint64("offset");
- uint64_t length = fields.uint64("length");
- require_image(ts, thread, imagectx, name, snap_name, readonly, ios);
- action_id_t ionum = next_id();
- IO::ptr io(new AioReadIO(ionum, ts, threadID, m_recent_completions,
- imagectx, offset, length));
- ios->push_back(io);
- thread->issued_io(io, &m_latest_ios);
- m_pending_ios[completion] = io;
- } else if (strcmp(event_name, "librbd:aio_write_enter") == 0 ||
- strcmp(event_name, "librbd:aio_write2_enter") == 0) {
- string name(fields.string("name"));
- string snap_name(fields.string("snap_name"));
- bool readonly = fields.int64("read_only");
- uint64_t offset = fields.uint64("off");
- uint64_t length = fields.uint64("len");
- uint64_t completion = fields.uint64("completion");
- imagectx_id_t imagectx = fields.uint64("imagectx");
- require_image(ts, thread, imagectx, name, snap_name, readonly, ios);
- action_id_t ionum = next_id();
- IO::ptr io(new AioWriteIO(ionum, ts, threadID, m_recent_completions,
- imagectx, offset, length));
- thread->issued_io(io, &m_latest_ios);
- ios->push_back(io);
- m_pending_ios[completion] = io;
- } else if (strcmp(event_name, "librbd:aio_discard_enter") == 0) {
- string name(fields.string("name"));
- string snap_name(fields.string("snap_name"));
- bool readonly = fields.int64("read_only");
- uint64_t offset = fields.uint64("off");
- uint64_t length = fields.uint64("len");
- uint64_t completion = fields.uint64("completion");
- imagectx_id_t imagectx = fields.uint64("imagectx");
- require_image(ts, thread, imagectx, name, snap_name, readonly, ios);
- action_id_t ionum = next_id();
- IO::ptr io(new AioDiscardIO(ionum, ts, threadID, m_recent_completions,
- imagectx, offset, length));
- thread->issued_io(io, &m_latest_ios);
- ios->push_back(io);
- m_pending_ios[completion] = io;
- } else if (strcmp(event_name, "librbd:aio_complete_enter") == 0) {
- uint64_t completion = fields.uint64("completion");
- map<uint64_t, IO::ptr>::iterator itr = m_pending_ios.find(completion);
- if (itr != m_pending_ios.end()) {
- IO::ptr completedIO(itr->second);
- m_pending_ios.erase(itr);
- completed(completedIO);
- }
- }
- }
-
- action_id_t next_id() {
- action_id_t id = m_io_count;
- m_io_count += 2;
- return id;
- }
-
- void completed(IO::ptr io) {
- uint64_t limit = (io->start_time() < m_window ?
- 0 : io->start_time() - m_window);
- for (io_set_t::iterator itr = m_recent_completions.begin();
- itr != m_recent_completions.end(); ) {
- IO::ptr recent_comp(*itr);
- if ((recent_comp->start_time() < limit ||
- io->dependencies().count(recent_comp) != 0) &&
- m_latest_ios.count(recent_comp) == 0) {
- m_recent_completions.erase(itr++);
- } else {
- ++itr;
- }
- }
- m_recent_completions.insert(io);
- }
-
- pair<string, string> map_image_snap(string image_name, string snap_name) {
- if (!m_anonymize) {
- return pair<string, string>(image_name, snap_name);
- }
- AnonymizedImage& m(m_anonymized_images[image_name]);
- if (m.image_name() == "") {
- m.init(image_name, m_anonymized_images.size());
- }
- return m.anonymize(snap_name);
- }
-
- void require_image(uint64_t ts,
- Thread::ptr thread,
- imagectx_id_t imagectx,
- const string& name,
- const string& snap_name,
- bool readonly,
- IO::ptrs *ios) {
- assert(thread);
- if (m_open_images.count(imagectx) > 0) {
- return;
- }
- action_id_t ionum = next_id();
- pair<string, string> aname(map_image_snap(name, snap_name));
- IO::ptr io(new OpenImageIO(ionum, ts - 2, thread->id(),
- m_recent_completions, imagectx, aname.first,
- aname.second, readonly));
- thread->issued_io(io, &m_latest_ios);
- ios->push_back(io);
- completed(io);
- m_open_images.insert(imagectx);
- }
-
- uint64_t m_window;
- map<thread_id_t, Thread::ptr> m_threads;
- uint32_t m_io_count;
- io_set_t m_recent_completions;
- set<imagectx_id_t> m_open_images;
-
- // keyed by completion
- map<uint64_t, IO::ptr> m_pending_ios;
- std::set<IO::ptr> m_latest_ios;
-
- bool m_anonymize;
- map<string, AnonymizedImage> m_anonymized_images;
-
- bool m_verbose;
-};
-
-int main(int argc, char** argv) {
- vector<string> args;
- for (int i = 0; i < argc; i++) {
- args.push_back(string(argv[i]));
- }
-
- Processor p;
- p.run(args);
-}
Code Review / stor4nfv.git / blobdiff